I'm using a Sager - you should check them out! The best part is that you custom order it - the way you want it. I configured mine at reflexnotebook.ca and couldn't be more thrilled with the results, three months into it.

Out of the box all of my hardware is supported, though I'm running Mint 17 (same base). The keyboard is a pleasure to type on, though the laptop is a bit weighty. The trackpad is great under linux, something that was sorely lacking on every single other machine I've tried (System76, IBMs, Dells, everything!). Even the function keys are recognized - which was a pleasant surprise over my System76.